EP2657888B1 - Appareil de lecture de support d'enregistrement magnétique - Google Patents

Appareil de lecture de support d'enregistrement magnétique Download PDF

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Publication number
EP2657888B1
EP2657888B1 EP10860934.8A EP10860934A EP2657888B1 EP 2657888 B1 EP2657888 B1 EP 2657888B1 EP 10860934 A EP10860934 A EP 10860934A EP 2657888 B1 EP2657888 B1 EP 2657888B1
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EP
European Patent Office
Prior art keywords
magnetic
card
magnetic field
interfering
magnetic stripe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP10860934.8A
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German (de)
English (en)
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EP2657888A4 (fr
EP2657888A1 (fr
Inventor
Tomoya Kimura
Tadamichi SUZUKI
Akihiro Tadamasa
Hiroyuki Suzuki
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Hitachi Omron Terminal Solutions Corp
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Hitachi Omron Terminal Solutions Corp
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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/0873—Details of the card reader
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
    • G07F19/20—Automatic teller machines [ATMs]
    • G07F19/205—Housing aspects of ATMs
    • G07F19/2055—Anti-skimming aspects at ATMs

Definitions

  • the present invention relates to a device for reading data recorded in a magnetic recording medium and, more particularly, to a magnetic recording medium reading device having the function of preventing illegal data acquisition.
  • a card reader for reading a magnetic card is installed in a transaction processing device such as an ATM (Automated Teller Machine) or a CD (Cash Dispenser).
  • a transaction processing device such as an ATM (Automated Teller Machine) or a CD (Cash Dispenser)
  • a card reader for reading a magnetic card is installed in a transaction processing device.
  • a crime called skimming of illegally obtaining data recorded in a magnetic stripe of a card when the magnetic card is inserted in a card reader occurs.
  • first type an illegal reader having a magnetic head is installed so as to cover a card insertion port of a card reader of an ATM or a CD, and data of a magnetic card inserted in the card reader is illegally obtained by the magnetic head of the illegal reader.
  • second type an illegal reader is connected to a magnetic stripe detector including a magnetic head for detecting a magnetic stripe installed near a card insertion port via a lead wire, and a signal output from the magnetic stripe detector (data read by the magnetic head) is illegally obtained via the lead wire.
  • Patent Literature 1 describes a card reader having an interfering magnetic field generator provided near a card insertion port.
  • an interfering magnetic field is generated in an outside region of the card insertion port by the interfering magnetic field generator. Consequently, even if an illegal reader is attached to the outside of a card insertion port, data read by the illegal reader is data different from original data recorded in a card under the influence of the interfering magnetic field. In such a manner, data of a card can be prevented from being illegally taken.
  • Patent Literature 2 describes a card reader in which a loop antenna for generating an interfering magnetic field is disposed around a card insertion port.
  • the antenna face of the loop antenna is parallel to the front face of the card insertion port.
  • an interfering magnetic field is generated' in an outside region of the card insertion port. Therefore, even if an illegal reader is attached to the outside of the card insertion port, data of a card can be prevented from being illegally taken.
  • Patent Literature 3 describes a card reader having a pre-head for detecting a magnetic stripe of a card, which is disposed near a card insertion port, and outputting a signal different from that of magnetic information recorded in the magnetic stripe therefrom.
  • a signal output from the pre-head is a signal different from that of information recorded in a card, so that data of a card can be prevented from being illegally taken.
  • DE 10 2009 019 708 A1 describes a device for the protection of a card reader which generates a magnetic or electric or electromagnetic field for disturbing devices which are intended for illegally obtaining data.
  • the amplitude, phase, frequency and/or spacial or time distribution of the field is generated coincidentally so that the device for illegally obtaining data is not able to identify and predict the magnetic or electric or electromagnetic field for disturbing the devices intended for illegally obtaining data, so that it can be prevented that the device intended for illegally obtaining data is able to compensate or filter the field for disturbing in such a way that the device intended for illegally obtaining data it is still able to illegally obtain card data regardless of the disturbing signal.
  • WO 2007/048649 A1 describes a protection device for generating an electromagnetic protection field which can impair the functionality of devices intended for illegally obtaining data.
  • the protection field is modified by a control unit during the time in which the card is read in the card reading device in such a way that the reading of the card in the card reading device is not impaired.
  • the protection device also includes a metal detector in order to detect devices intended for illegally obtaining data.
  • Patent Literature 1 The card reader described in Patent Literature 1 is effective against skimming of the first type of attaching an illegal reader to the outside of a card insertion port since an interfering magnetic field is generated in the outside region of the card insertion port.
  • the skimming of the second type of attaching an illegal reader to a magnetic stripe detector via a lead wire there is the possibility that data is illegally taken.
  • the card reader described in Patent Literature 2 is also effective against the skimming of the first type since an interfering magnetic field is generated in the outside region of a card insertion port.
  • the card reader is not provided with a magnetic head for detecting a magnetic stripe, and a measure against the skimming of the second type is not considered.
  • Patent Literature 3 is effective against the skimming of the second type since a signal which is output from the pre-head is a signal different from that of information recorded in a card.
  • signal converting means for converting a signal read by the head of the pre-head to a signal different from the read signal is necessary, and the configuration is therefore complicated.
  • data may be illegally taken by an illegal reader attached to the outside of a card insertion port.
  • the present invention is defined by a magnetic recording medium reading device according to claim 1.
  • a signal output from the magnetic stripe detecting unit is a signal by which only determination of the existence of data in the magnetic stripe can be performed, but is not a signal by which the data recorded in the magnetic stripe can be completely reproduced. Consequently, illegal data acquisition by the skimming of the second type can be prevented.
  • the interfering magnetic field generated by the magnetic field generating unit acted also on the outside of the insertion port, illegal data acquisition by skimming of the first type can be also prevented.
  • the magnetic field generating unit may be provided closer to the insertion port side than the magnetic head in an insertion direction of the magnetic recording medium.
  • a card reader 1 has a control unit 2 including a CPU for controlling the operations of the entire device, a magnetic information reading unit 3 for reading magnetic data recorded in a magnetic card, a card carrying unit 4 for carrying a magnetic card, a card detection sensor 5 for detecting a magnetic card, a memory 6 for storing magnetic data read by the magnetic information reading unit 3, a host interface 7 as a connection with a host device (for example, ATM), a magnetic stripe detecting unit 10 for detecting a magnetic stripe of a magnetic card, and a magnetic field generating unit 8 for generating an interfering magnetic field to prevent reading of data recorded in the magnetic stripe.
  • a control unit 2 including a CPU for controlling the operations of the entire device, a magnetic information reading unit 3 for reading magnetic data recorded in a magnetic card, a card carrying unit 4 for carrying a magnetic card, a card detection sensor 5 for detecting a magnetic card, a memory 6 for storing magnetic data read by the magnetic information reading unit 3, a host interface 7 as a connection with a host
  • the control unit 2 includes a magnetic field control unit 9 for controlling the magnetic field generating unit 8 and a card carriage control unit 12 for controlling the card carrying unit 4.
  • the magnetic stripe detecting unit 10 and the magnetic field generating unit 8 are disposed in a card insertion port unit 24.
  • the magnetic stripe detecting unit 10 includes a magnetic head 34 ( Fig. 2a ) which will be described later.
  • the magnetic field generating unit 8 includes a loop antenna 35 ( Fig. 2b ) which will be described later.
  • the card insertion port unit 24 is provided in the front face of a casing 100 of the card reader 1.
  • an insertion port 22 in which a magnetic card (hereinbelow, simply called a "card") 21 is to be inserted is formed in the card insertion port unit 24 in which a magnetic card (hereinbelow, simply called a "card") 21 is to be inserted.
  • the card 21 has a magnetic stripe 21a.
  • Fig. 3 is a rear view of the card 21.
  • the card insertion detection sensor 23 is a pressure sensor and disposed in a position where it is pressed by the card 21 inserted through the insertion port 22.
  • the magnetic head 34 for detecting a magnetic stripe is also provided near the insertion port 22. The magnetic head 34 detects the magnetic stripe 21a of the card 21.
  • carrier rollers 25 to 28 In the casing 100 of the card reader 1, carrier rollers 25 to 28, card position detection sensors 30 to 33, and a magnetic head 29 are provided.
  • Each of the carrier rollers 25 to 28 consists of a pair of rollers disposed on the upper and lower sides of a carrier path P, and the card 21 is carried while being sandwiched by the pair of rollers.
  • the carrier rollers 25 to 28 are coupled to a motor (not illustrated) via a carrier belt (not illustrated) .
  • One of a pair of carrier rollers is a drive roller to which the rotational force of the motor is transmitted, and the other roller is a driven roller which rotates in accordance with the drive roller.
  • the carrier rollers 25 to 28 construct the card carrying unit 4 ( Fig. 1 ) together with the carrier belt and the motor.
  • Each of the card position detection sensors 30 to 33 is an optical sensor of the transmission type and has a light emitting unit and a light receiving unit which are opposed to each other across the carrier path P.
  • the arrangement interval of the sensors 30 to 33 is shorter than the length in the carriage direction of the magnetic card 21.
  • the sensor 30 detects that the card 21 is sandwiched by the carrier rollers 25 which are closest to the insertion port 22.
  • the sensor 33 detects that the inserted card 21 reaches a storage part (not illustrated) temporarily storing a card.
  • the sensors 31 and 32 detect the position of the card 21 being carried.
  • the card position detection sensors 30 to 33 construct the card detection sensor 5 ( Fig. 1 ) together with the card insertion detection sensor 23.
  • the magnetic head 29 is provided on the lower side of the carrier path P between the carrier rollers 26 and the carrier rollers 27.
  • the magnetic head 29 reads data recorded in the magnetic stripe 21a of the card 21 in the process of carriage of the inserted card 21 in the carrier path P.
  • the magnetic head 34 is a magnetic head for detecting the existence of data recorded in a magnetic stripe whereas the magnetic head 29 is a magnetic head for reproducing data itself recorded in the magnetic stripe.
  • the interval between the magnetic head 29 and the sensor 33 is slightly longer than the length in the carriage direction of the card 21. Therefore, when the card 21 reaches the storage part, that is, when the front end of the card 21 reaches the position of the sensor 33, the magnetic head 29 completes reading of the data recorded in the card 21.
  • the loop antenna 35 is provided near the front face of the card insertion port unit 24. As understood from Fig. 2a , the loop antenna 35 is provided closer to the insertion port 22 side than the magnetic head 34 for detecting a magnetic stripe in the insertion direction A of the card 21 near the insertion port 22.
  • the loop antenna 35 is an antenna obtained by winding a conductor once or a plurality of times in a loop shape and is disposed so as to surround the insertion port 22 as illustrated in Fig. 2b .
  • the loop antenna 35 When drive current flows in the loop antenna 35 in the magnetic field generating unit 8 based on control of the magnetic field control unit 9, the loop antenna 35 generates a magnetic field around the insertion port 22.
  • the magnetic field acts as an interfering magnetic field on the magnetic head 34 for detecting a magnetic stripe on the rear side of the insertion port 22 and disturbs reading of magnetic information in the magnetic head 34.
  • the magnetic field is generated also on the outside (front side) of the insertion port 22 and, in the case where an illegal reader (not illustrated) is attached to the outside of the insertion port 22, disturbs reading of magnetic information by the illegal reader.
  • Fig. 4 illustrates the procedure in the case of taking and reading the card 21 at the time of card insertion.
  • the process in each of steps is executed by the control unit 2. It is assumed that the loop antenna 35 generates an interfering magnetic field also in a state where the card 21 is not inserted in the insertion port 22.
  • the control unit 2 determines whether or not insertion of the card 21 is detected by the card insertion detection sensor 23 (step S1). When insertion of the card 21 is not detected (NO in step S1), the control unit 2 repeatedly executes the step S1 and waits until insertion of the card 21 is detected. When insertion of the card 21 is detected (YES in step S1), the control unit 2 determines whether or not a magnetic stripe is detected by the magnetic stripe detecting unit 10, that is, whether or not magnetic data is read from the magnetic stripe 21a of the card 21 by the magnetic head 34 for detecting a magnetic stripe (step S2). When the magnetic stripe is not detected (NO in step S2), the control unit 2 determines that the card 21 is not a magnetic card or is a magnetic card in which no data is recorded in a magnetic stripe, and returns to step S1.
  • step S2 When a magnetic stripe is detected (YES in step S2), the control unit 2 determines that the card 21 in which magnetic data is recorded is inserted, and rotates the carrier rollers 25 to 28 by the card carriage control unit 12 to start carriage of the card 21 (step S3). At this time, the carrier rollers 25 to 28 rotate in the direction of taking the inserted card 21 into the casing 100 (hereinbelow, called a "forward direction"). Thus, the card 21 passes through the carrier path P and is taken in the casing 100. In the process of carrying the card 21 in the carrier path P, magnetic data recorded in the magnetic stripe 21a of the card 21 is read by the magnetic head 29 (step S4).
  • the control unit 2 determines whether or not the sensor 33 disposed next to the carrier roller 28 detects the end (the right end in Fig. 2a ) of the card 21 (step S5).
  • the control unit 2 repeatedly executes the step S5. Specifically, the control unit 2 rotates the carrier rollers 25 to 28 in the forward direction and continues carriage of the card 21 until the card end is detected.
  • the control unit 2 determines that the carried card 21 reaches the rear end of the carrier path P and stops the rotation of the carrier rollers 25 to 28 by the card carriage control unit 12 to stop the carriage of the card 21 (step S6). At this time, the card 21 is temporarily stored in the storage part (not illustrated). Thus, the series of all of processes of Fig. 4 is finished.
  • Fig. 5 illustrates the procedure of the case of returning the card 21. The process in each of steps is executed by the control unit 2.
  • control unit 2 rotates the carrier rollers 25 to 28 by the card carriage control unit 12 to start carriage of the card 21 (step S11).
  • the carriage rollers 25 to 28 rotate in the direction of carrying the inserted card 21 from the storage part to the insertion port 22 (hereinbelow, called a "reverse direction"). Consequently, the card 21 is carried in the carrier path P toward the insertion port 22.
  • the interfering magnetic field is generated by the loop antenna 35.
  • control unit 2 determines whether or not the sensor 30 disposed next to the carrier roller 25 detects the end (the right end in Fig. 2a ) of the card 21 (step S12).
  • the control unit 2 repeatedly executes the step S12. Specifically, the control unit 2 rotates the carrier rollers 25 to 28 in the reverse direction and continues carriage of the card 21 until the card end is detected.
  • the control unit 2 determines that the carried card 21 is returned to the insertion port 22 and stops the rotation of the carrier rollers 25 to 28 by the card carriage control unit 12 to cease carrying the card 21 (step S13). At this time, as illustrated in Fig. 2a , the card 21 is sandwiched by the upper and lower carrier rollers 25, and the end portion of the card projects to the outside from the insertion port 22. Consequently, a user can hold the end portion of the card 21 projected from the insertion port 22 and pull the card 21 out.
  • the control unit 2 determines whether or not the extraction of the card 21 is detected by the card insertion detection sensor 23 (step S14). In a state where the card insertion detection sensor 23 detects the card, the control unit 2 determines that the card 21 is not pulled out (NO in step S14), repeatedly executes the step S14, and waits until the card 21 is pulled out. When the card insertion detection sensor 23 changes from the card detection state to a state where the card is not detected, the control unit 2 determines that the card 21 is pulled out (YES in step S14) and finishes the process. Thus, the series of all of processes in Fig. 5 is finished.
  • Fig. 6 is a timing chart of magnetic stripe detection executed in step S2 in the flowchart of Fig. 4 .
  • a pause period X is provided in the interfering magnetic field generated by the magnetic field generating unit 8, and data of the magnetic stripe is read in the pause period X.
  • drive current as illustrated in Fig. 6 is passed through the loop antenna 35.
  • the drive current is an alternating current signal having a predetermined oscillation frequency and the pause period X in which oscillation stops periodically. Consequently, the interfering magnetic field is generated intermittently from the loop antenna 35.
  • the magnetic stripe detecting unit 10 reads data recorded in the magnetic stripe 21a of the card 21 by the magnetic head 34 and outputs the result as a magnetic stripe detection signal.
  • the magnetic head 34 Since the interfering magnetic field acts on the magnetic head 34 for detecting a magnetic stripe while the interfering magnetic field is generated by the loop antenna 35, the magnetic head 34 cannot read magnetic data of the card 21. Therefore, even if the skimming of the second type of coupling a lead wire to the output terminal of the magnetic stripe detecting unit 10 and reading magnetic data of the card 21 by an illegal reader via the lead wire is performed, the magnetic data of the card 21 cannot be taken in the interfering magnetic field generation periods (the periods other than X).
  • the magnetic data of the card 21 can be read by an illegal reader.
  • the pause period X is actually an extremely short time, data read by the illegal reader during the period is just a piece of the magnetic data of the card 21. Consequently, the original data recorded in the magnetic stripe 21a of the card 21 cannot be restored from the data read by the illegal reader.
  • the data read from the magnetic stripe 21a by the magnetic head 34 in the pause period X is also a very small part of the magnetic data of the card 21.
  • the magnetic head 34 is a magnetic head for detecting a magnetic stripe but is not a magnetic head for reproducing magnetic data, so that it is sufficient to detect whether or not magnetic data is recorded in the magnetic stripe 21a. Therefore, even if the data read by the magnetic head 34 in the pause period X is a part of the original data, there is no problem in determination of the existence of data in the magnetic stripe 21a.
  • the interfering magnetic field generated by the loop antenna 35 is acted on the magnetic head 34 for detecting a magnetic stripe, and data in the magnetic stripe 21a of the card 21 is read by the magnetic head 34 during the interfering magnetic field pause period. Consequently, even if an illegal reader is attached to the output terminal of the magnetic stripe detecting unit 10 via a lead wire, a signal output from the magnetic stripe detecting unit 10 during the pause period X is a signal (a part of original data) by which only determination of the existence of data in the magnetic stripe 21a can be performed but is not a signal by which the data recorded in the magnetic stripe 21a can be completely reproduced. Therefore, illegal data acquisition by the skimming of the second type can be prevented.
  • the interfering magnetic field of the loop antenna 35 act also on the outside of the insertion port 22, illegal data acquisition by the skimming of the first type of attaching an illegal reader to the outside of the insertion port 22 can be also prevented.
  • the loop antenna 35 is provided closer to the insertion port 22 side than the magnetic head 34 in the insertion direction A of the card 21, magnetic data of the card 21 is not read by the magnetic head 34 before the interfering magnetic field acts.
  • the illegal data acquisition by the skimming of the second type can be prevented more effectively.
  • a configuration of a card reader in the second example is the same as that in Fig. 1 and Figs. 2a to 2d , and therefore, the description thereof will not be given.
  • the basic operation of the card reader is the same as that of Figs. 4 and 5 , and therefore, the description thereof will not be given.
  • Figs. 7a to 7c are timing charts of magnetic stripe detection executed in step S2 in the flowchart of Fig. 4 .
  • the magnetic head 34 performs the reading operation only during the pause periods X of the interfering magnetic field.
  • the magnetic head 34 performs the reading operation also in the periods other than the pause periods X.
  • the drive current as illustrated in Fig. 7a is passed through the loop antenna 35.
  • the drive current is the same as the drive current ( Fig. 6 ) in the first embodiment.
  • the magnetic stripe detecting unit 10 reads data recorded in the magnetic stripe 21a of the card 21 by the magnetic head 34 and outputs the result as a magnetic stripe detection signal.
  • the magnetic head 34 continues the reading operation. Consequently, a reception signal of a level according to the intensity of the magnetic field received by the magnetic head 34 is output from the magnetic stripe detecting unit 10. Then, in the periods W, the control unit 2 determines whether or not the interfering magnetic field generated by the loop antenna 35 is normally received by the magnetic head 34 based on the level of the reception signal output from the magnetic stripe detecting unit 10.
  • a reference level ⁇ is set for the reception signal level.
  • the control unit 2 determines that the interfering magnetic field is normally received by the magnetic head 34.
  • the control unit 2 determines that the interfering magnetic field is not normally received by the magnetic head 34 and something abnormal occurs in the magnetic field generating unit 8 or the magnetic field control unit 9.
  • the control unit 2 transmits an alarm signal to a host device (not illustrated) via the host interface 7 ( Fig. 1 ).
  • the host device receives the alarm signal and performs a predetermined process such as display of abnormality occurrence.
  • the second example by making the interfering magnetic field acted on the magnetic head 34 and reading data of the card 21 by the magnetic head 34 during the interfering magnetic field pause period, a measure against skimming similar to that of the first embodiment can be performed. Further, by monitoring the level of an output signal of the magnetic stripe detecting unit 10 during the periods other than the pause periods, the quality of the reception state of the interfering magnetic field in the magnetic head 34 can be determined.
  • a configuration of a card reader in the third example is the same as that in Fig. 1 and Figs. 2a to 2d , and therefore, the description thereof will not be given.
  • the basic operation of the card reader is the same as that of Figs. 4 and 5 , and therefore, the description thereof will not be given.
  • Figs. 8a and 8b are timing charts of magnetic stripe detection executed in step S2 in the flowchart of Fig. 4 .
  • the pause periods X are provided for the interfering magnetic field in the foregoing first embodiment
  • periods Y in which the frequency changes are provided for the interfering magnetic field.
  • the drive current is an alternating current signal having a predetermined oscillation frequency and the period Y in which the frequency changes periodically (hereinbelow, called "frequency change period") . That is, in the periods other than Y, the frequency of the drive current is f1 (first frequency) . In the frequency change period Y, the frequency of the drive current changes from f1 to f2 (second frequency) . Although f1 ⁇ f2 is satisfied here, f1 > f2 is also possible.
  • the magnetic stripe detecting unit 10 reads data recorded in the magnetic stripe 21a of the card 21 by the magnetic head 34.
  • the magnetic stripe detecting unit 10 performs a filtering process for eliminating the signal having the frequency f2 on the read data and outputs a signal after the filtering as a magnetic stripe detection signal.
  • a signal obtained by eliminating the signal having the frequency f2 in the frequency change period Y as illustrated in Fig. 8b is output.
  • the interfering magnetic field generated by the loop antenna 35 always acts on the magnetic head 34. Consequently, even if the skimming of the second type of coupling a lead wire to the output terminal of the magnetic stripe detecting unit 10 and reading magnetic data of the card 21 by an illegal reader via the lead wire is performed, the magnetic data of the card 21 cannot be taken.
  • a signal output from the magnetic stripe detecting unit 10 becomes different from that of the original data recorded in the card 21 by the filtering process.
  • the magnetic head 34 can detect the existence of magnetic data in the magnetic stripe 21a and it is unnecessary to reproduce the magnetic data.
  • the magnetic head 34 reads the data.
  • a signal which does not include the frequency f2 is output from the magnetic stripe detecting unit 10 in the frequency change period Y, so that the existence of magnetic data can be determined by the signal. Since the signal is a signal by which only determination of the existence of data in the magnetic stripe 21a can be performed, even if the signal is read in the frequency change period Y by the skimming of the second type, the original data cannot be reproduced.
  • the third example by making the interfering magnetic field acted on the magnetic head 34 and reading the data of the card 21 by the magnetic head 34 in a period of a specific frequency while changing the frequency of the interfering magnetic field, a measure against skimming similar to that in the first embodiment can be performed. Since the interfering magnetic field always acts on the magnetic head 34, a measure against an illegal act can be performed more reliably.
  • a fourth example of the present invention will be described. Note that, a configuration of a card reader in the fourth example is the same as that in Fig. 1 and Figs. 2a to 2d , and therefore, the description thereof will not be given.
  • the loop antenna 35 always generates an interfering magnetic field having a random frequency (first frequency) and, when insertion of the magnetic card 21 is detected, switches the random frequency to the constant frequency (second frequency).
  • the magnetic stripe detecting unit 10 reads data recorded in the magnetic stripe 21a of the card 21 by the magnetic head 34.
  • the magnetic stripe detecting unit 10 then performs a filtering process for eliminating the signal having the frequency fo on the read data and outputs a signal after the filtering as a magnetic stripe detection signal.
  • a signal obtained by eliminating the signal having the frequency fo in the period Z2 as illustrated in Fig. 9b is output.
  • the frequency of the drive current flowing in the loop antenna 35 switches from the constant frequency fo to the random frequency.
  • the interfering magnetic field having random frequency is generated again from the loop antenna 35.
  • Fig. 10 illustrates the procedure in the case of performing take-in and reading of the card 21 in the fourth example. The process in each of steps is executed by the control unit 2.
  • the control unit 2 determines whether or not insertion of the card 21 is detected by the card insertion detection sensor 23 (step S21). When insertion of the card 21 is not detected (NO in step S21), the control unit 2 repeatedly executes step S21 and waits until insertion of the card 21 is detected. When insertion of the card 21 is detected (YES in step S21), the magnetic field control unit 9 controls the magnetic field generating unit 8 to change the frequency of the interfering magnetic field generated by the loop antenna 35 from random frequency to constant frequency (stepS22) . Moreover, from this time point, the magnetic stripe detecting unit 10 starts detection of a magnetic stripe.
  • control unit 2 determines whether or not a magnetic stripe is detected by the magnetic stripe detecting unit 10, that is, whether or not magnetic data is read from the magnetic stripe 21a of the card 21 by the magnetic head 34 for detecting a magnetic stripe (step S23).
  • the control unit 2 determines that the card 21 is not a magnetic card or is a magnetic card in which no data is recorded in a magnetic stripe, and returns to step S21.
  • the magnetic field control unit 9 controls the magnetic field generating unit 8 to return the frequency of the interfering magnetic field generated by the loop antenna 35 to random frequency (step S24).
  • the control unit 2 determines that the card 21 in which magnetic data is recorded is inserted and rotates the carrier rollers 25 to 28 in the forward direction by the card carriage control unit 12 to start carriage of the card 21 (step S25).
  • the card 21 passes through the carrier path P and is taken in the casing 100.
  • magnetic data recorded in the magnetic stripe 21a of the card 21 is read by the magnetic head 29 (step S26).
  • the control unit 2 determines whether or not the sensor 33 disposed next to the carrier roller 28 detects the end (the right end in Fig. 2a ) of the card 21 (step S27).
  • the control unit 2 repeatedly executes the step S27. Specifically, the control unit 2 rotates the carrier rollers 25 to 28 in the forward direction and continues carriage of the card 21 until the card end is detected.
  • the control unit 2 determines that the carried card 21 has reached the rear end of the carrier path P and stops the rotation of the carrier rollers 25 to 28 by the card carriage control unit 12 to cease carrying the card 21 (step S28).
  • the card 21 is temporarily stored in the storage part (not illustrated) .
  • the series of all of processes of Fig. 10 is finished. Note that, the operation at the time of returning the card is the same as that in Fig. 5 , and therefore, the description thereof will not be given.
  • the fourth embodiment in a manner similar to the third example, since the interfering magnetic field generated by the loop antenna 35 always acts on the magnetic head 34, even if the skimming of the second type of coupling a lead wire to the output terminal of the magnetic stripe detecting unit 10 and reading magnetic data of the card 21 by an illegal reader via the lead wire is performed, the magnetic data of the card 21 cannot be taken.
  • a signal output from the magnetic stripe detecting unit 10 becomes different from that of original data recorded in the card 21 by the filtering process.
  • the magnetic head 34 reads the data.
  • a signal which does not include the frequency fo is output from the magnetic stripe detecting unit 10.
  • the existence of magnetic data can be determined. Since the above signal is a signal by which only determination of the existence of data in the magnetic stripe 21a can be performed, even if the signal is read in the period Z2 by the skimming of the second type, the original data cannot be reproduced.
  • the fourth example by normally making the interfering magnetic field having random frequency acted on the magnetic head 34, on detection of insertion of the card 21, setting the frequency of the interfering magnetic field to the constant frequency fo, and reading the data of the card 21 by the magnetic head 34, a measure against skimming similar to that in the first embodiment can be performed. Since the interfering magnetic field always acts on the magnetic head 34, a measure against an illegal act can be performed more reliably.
  • a fifth example of the present invention will be described.
  • the configuration of a card reader in the fifth example is the same as that in Fig. 1 and Figs. 2a to 2d , and therefore, the description thereof will not be given.
  • the basic operation of the card reader is the same as that in Figs. 4 and 5 , and therefore, the description thereof will not be given.
  • the interfering magnetic field generated by the loop antenna 35 is changed only in a specific period to a state different from that in the other period.
  • the magnetic stripe detecting unit 10 without changing the state of the interfering magnetic field, performs a filtering process for eliminating a signal having a frequency which is in the same band as that of the frequency of the interfering magnetic field on data read from the magnetic stripe 21a by the magnetic head 34. The detailed description will be given below.
  • Fig. 11a illustrates the frequency spectrum of a reception signal in the magnetic stripe detecting unit 10 in the case of superimposing the interfering magnetic field of the loop antenna 35 on magnetic data of the card 21 and reading the resultant by the magnetic head 34.
  • a reception signal in a state where only the interfering magnetic field exists and no magnetic data exists is a signal as illustrated in Fig. 12a
  • a reception signal in a state where the interfering magnetic field does not exist and only magnetic data exists is a signal as illustrated in Fig. 12b
  • a reception signal of the magnetic stripe detecting unit 10 in a state where the interfering magnetic field is superimposed on magnetic data will be a signal as illustrated in Fig. 12c , which is obtained by combining the signal of Fig. 12a and the signal of Fig. 12b . Consequently, the reception signal includes a wide frequency component as illustrated in Fig. 11a .
  • Fig. 11b illustrates the characteristic of a filter provided for the magnetic stripe detecting unit 10.
  • the filter eliminates a specific frequency component, that is, a frequency component in the same band as that of the frequency of the interfering magnetic field from the reception signal having the frequency spectrum of Fig. 11a.
  • Fig. 11c illustrates the frequency spectrum obtained by performing a filtering process on the reception signal of the magnetic stripe detecting unit 10 by a filter having the characteristic of Fig. 11b .
  • a part of the frequency component in the same band as that of the interfering magnetic field is eliminated from the reception signal by the filtering process.
  • the magnetic stripe detecting unit 10 due to the filtering process described above, in the magnetic stripe detecting unit 10, a part of the magnetic data of the card 21 is lost from the reception signal. However, since the frequency of the reception signal lies in a wide range as illustrated in Fig. 11a , all of the magnetic data is not lost. Therefore, by a signal output from the magnetic stripe detecting unit 10 based on residual data, the existence of magnetic data can be determined. Since the output signal is a signal by which only determination of the existence of data in the magnetic stripe 21a can be performed, even if the signal is read by the skimming of the second type, the original data cannot be reproduced.
  • the fifth example by making the interfering magnetic field acted on the magnetic head 34 and performing a filtering process for eliminating a frequency component which is in the same band as that of the frequency of the interfering magnetic field on a reception signal of the magnetic stripe detecting unit 10, a measure against skimming similar to that of the first embodiment can be performed. Further, since the interfering magnetic field always acts on the magnetic head 34, a measure against an illegal act can be performed more reliably. Moreover, since the state of the interfering magnetic field is not changed, the control in the magnetic field control unit 9 is simplified.
  • a sixth example of the present invention will be described.
  • the configuration of a card reader in the sixth example is the same as that in Fig. 1 and Figs. 2a to 2d , and therefore, the description thereof will not be given.
  • the basic operation of the card reader is the same as that in Figs. 4 and 5 , and therefore, the description thereof will not be given.
  • magnetic stripe detection is performed by monitoring whether or not the frequency of a detection signal output from the magnetic stripe detecting unit 10 shifts with respect to the frequency of the interfering magnetic field.
  • Figs. 13a to 13c illustrate the waveforms of the reception signals of the magnetic stripe detecting unit 10.
  • Fig. 13a is the waveform of a reception signal by the interfering magnetic field
  • Fig. 13b is the waveform of a reception signal by magnetic data of the card 21
  • Fig. 13c is the waveform of a reception signal in a state where the interfering magnetic field is superimposed on magnetic data.
  • Figs. 13a to 13c are similar to Figs. 12a to 12c , respectively.
  • a predetermined threshold ⁇ is set with respect to the level of a reception signal by the interfering magnetic field.
  • the control unit 2 detects time T from the rising edge of a reception signal to the next rising edge thereof at the threshold ⁇ .
  • the time T corresponds to the frequency of the interfering magnetic field generated by the loop antenna 35 and is constant.
  • the same threshold ⁇ is set for a reception signal in a state where the interfering magnetic field is superimposed on magnetic data.
  • the signal of Fig. 13c is output as a detection signal from the magnetic stripe detecting unit 10.
  • the control unit 2 detects time from the rising edge of a reception signal at the threshold ⁇ to the next rising edge thereof. The time corresponds to the frequency of the detection signal and varies like T1 to T5. That is, the frequency of the detection signal shifts from the frequency of the interfering magnetic field.
  • the control unit 2 determines whether or not the frequency of the detection signal output from the magnetic stripe detecting unit 10 shifts from the frequency of the interfering magnetic field and, in the case where the frequency of the detection signal shifts, determines that the magnetic card 21 in which magnetic data is recorded in the magnetic stripe 21a is inserted.
  • the magnetic stripe detecting unit 10 may generate a pulse signal (indicated by broken line) at the rising edge of a reception signal at the threshold ⁇ and output the pulse signal to the control unit 2 as the detection signal.
  • the interfering magnetic field generated by the loop antenna 35 since the interfering magnetic field generated by the loop antenna 35 always acts on the magnetic head 34, even if the skimming of the second type of coupling a lead wire to the output terminal of the magnetic stripe detecting unit 10 and reading magnetic data of the card 21 by an illegal reader via the lead wire is performed, the magnetic data of the card 21 cannot be taken.
  • this detection signal is a signal by which only determination of the existence of data in the magnetic stripe 21a can be performed, even if the signal is read by the skimming of the second type, the original data cannot be reproduced.
  • the sixth example by making the interfering magnetic field acted on the magnetic head 34 and performing the magnetic stripe detection based on a fluctuation in the frequency of the output signal of the magnetic stripe detecting unit 10 with respect to the frequency of the interfering magnetic field, a measure against skimming similar to that in the first embodiment can be performed. Since the interfering magnetic field always acts on the magnetic head 34, a measure against an illegal act can be performed more reliably. Further, since the state of the interfering magnetic field is not changed, in amanner similar to the case of the fifth example, the control in the magnetic field control unit 9 is simplified.
  • a single loop antenna 35c may be disposed only near the magnetic head 34 for detecting a magnetic stripe ( Fig. 2a ).
  • the magnetic field can have directivity or a stronger interfering magnetic field can be generated.
  • the magnetic card having the magnetic stripe on its rear surface was described as an example.
  • the present invention can be also applied to a magnetic recording medium reading device handling a magnetic card having a magnetic stripe on the surface or both surface and rear surface.
  • a magnetic card was described as a magnetic recording medium.
  • the present invention can be also applied to a device for reading, not limited to a magnetic card but, a magnetic recording medium such as a passbook having a magnetic stripe.
  • the present invention can be applied to devices for reading a magnetic recording medium such as a card reader and a passbook reader installed on an automatic transaction processing device such as an ATM, or a card reader installed in a card verifying terminal.
  • a magnetic recording medium such as a card reader and a passbook reader installed on an automatic transaction processing device such as an ATM, or a card reader installed in a card verifying terminal.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)

Claims (3)

  1. Dispositif de lecture de support d'enregistrement magnétique (1) comprenant :
    un orifice d'introduction (22) dans lequel un support d'enregistrement magnétique (21) doit être introduit ;
    une unité de détection de ruban magnétique (10) incluant une tête magnétique (34) qui détecte un ruban magnétique (21a) du support d'enregistrement magnétique (21) ;
    une unité de génération de champ magnétique (8) qui génère un champ magnétique d'interférence pour perturber la lecture des données enregistrées dans le ruban magnétique (21a) du support d'enregistrement magnétique (21) ; et
    une unité de commande (2) qui détermine l'existence de données enregistrées dans le ruban magnétique (21a) sur la base d'un signal de détection délivré depuis l'unité de détection de ruban magnétique (10), dans lequel
    l'unité de génération de champ magnétique (8) est prévue proche de l'orifice d'introduction (22) et produit le champ magnétique d'interférence agissant sur la tête magnétique (34) tout en changeant le champ magnétique d'interférence uniquement pendant une période spécifique vers un état différent de celui dans l'autre période, et
    caractérisé en ce que :
    dans le cas où l'unité de génération de champ magnétique (8) génère un champ magnétique d'interférence et le support d'enregistrement magnétique (21) est introduit à travers l'orifice d'introduction (22), l'unité de détection de ruban magnétique (10), dans la période spécifique, lit une très petite partie des données dans le ruban magnétique (21a) par la tête magnétique (34) et délivre un signal de détection au moyen duquel les données enregistrées dans le ruban magnétique (21a) ne peuvent pas être complètement reproduites mais qu'il est possible d'effectuer uniquement une détermination de l'existence de données enregistrées dans le ruban magnétique (21a),
    dans lequel la période spécifique est une période de pause dans laquelle le champ magnétique interférence fait une pause.
  2. Dispositif de lecture de support d'enregistrement magnétique (1) selon la revendication 1, dans lequel l'unité de génération de champ magnétique (8) est prévue plus proche du côté de l'orifice d'introduction (22) que la tête magnétique (34) dans une direction d'introduction du support d'enregistrement magnétique (21).
  3. Dispositif de lecture de support d'enregistrement magnétique (1) selon la revendication 2, dans lequel l'unité de commande (2) détermine quant à savoir si le champ magnétique interférence généré par l'unité de génération de champ magnétique (8) est ou non normalement reçu par la tête magnétique (34) sur la base d'un niveau d'un signal délivré depuis l'unité de détection de ruban magnétique (10) dans une période autre que la période de pause.
EP10860934.8A 2010-12-22 2010-12-22 Appareil de lecture de support d'enregistrement magnétique Active EP2657888B1 (fr)

Applications Claiming Priority (1)

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PCT/JP2010/007428 WO2012085967A1 (fr) 2010-12-22 2010-12-22 Appareil de lecture de support d'enregistrement magnétique

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JP6218524B2 (ja) * 2013-09-18 2017-10-25 日本電産サンキョー株式会社 磁気記録媒体処理装置および磁気記録媒体処理装置の制御方法
JP2015108954A (ja) * 2013-12-04 2015-06-11 Ｎｅｃプラットフォームズ株式会社 カード読み取り装置、自動取引装置、制御方法およびプログラム
JP2015197687A (ja) * 2014-03-31 2015-11-09 日本電産サンキョー株式会社 磁界発生装置、磁気記録媒体処理装置および磁気記録媒体処理装置の制御方法
JP6178759B2 (ja) * 2014-07-08 2017-08-09 日本電産サンキョー株式会社 カードリーダ
JP6211498B2 (ja) * 2014-09-26 2017-10-11 日本電産サンキョー株式会社 カードリーダおよびカードリーダの制御方法
JP6377542B2 (ja) * 2015-01-26 2018-08-22 日立オムロンターミナルソリューションズ株式会社 カード処理装置
JP2016189055A (ja) 2015-03-30 2016-11-04 日本電産サンキョー株式会社 カードリーダ
JP6417264B2 (ja) * 2015-04-17 2018-11-07 日立オムロンターミナルソリューションズ株式会社 カード挿入排出口ユニット、カード処理装置及び自動取引装置
JP6492984B2 (ja) * 2015-06-03 2019-04-03 沖電気工業株式会社 自動取引装置
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KR20170104743A (ko) * 2016-03-08 2017-09-18 주식회사 엘지씨엔에스 금융기기 및 금융기기 제어방법
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JP2020113357A (ja) * 2019-01-17 2020-07-27 日本電産サンキョー株式会社 磁気記録媒体処理装置および制御方法
JP6680931B2 (ja) * 2019-05-16 2020-04-15 日本電産サンキョー株式会社 磁界発生装置、磁界発生装置の制御方法、および磁気記録媒体処理装置

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JP5629330B2 (ja) 2014-11-19
JPWO2012085967A1 (ja) 2014-05-22
EP2657888A4 (fr) 2015-08-19
KR101388121B1 (ko) 2014-04-23
KR20130069792A (ko) 2013-06-26
EP2657888A1 (fr) 2013-10-30
CN103210402A (zh) 2013-07-17
WO2012085967A1 (fr) 2012-06-28
CN103210402B (zh) 2016-06-08

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